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-rw-r--r--fastiv-io.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/fastiv-io.c b/fastiv-io.c
index 87e26b3..e637d1d 100644
--- a/fastiv-io.c
+++ b/fastiv-io.c
@@ -33,6 +33,9 @@
#ifdef HAVE_XCURSOR
#include <X11/Xcursor/Xcursor.h>
#endif // HAVE_XCURSOR
+#ifdef HAVE_LIBWEBP
+#include <webp/decode.h>
+#endif // HAVE_LIBWEBP
#ifdef HAVE_LIBHEIF
#include <libheif/heif.h>
#endif // HAVE_LIBHEIF
@@ -1110,6 +1113,67 @@ open_xcursor(const gchar *data, gsize len, GError **error)
}
#endif // HAVE_XCURSOR --------------------------------------------------------
+#ifdef HAVE_LIBWEBP //---------------------------------------------------------
+
+static cairo_surface_t *
+open_libwebp(const gchar *data, gsize len, GError **error)
+{
+ // It is wholly zero-initialized by libwebp.
+ WebPDecoderConfig config = {};
+ if (!WebPInitDecoderConfig(&config)) {
+ set_error(error, "libwebp version mismatch");
+ return NULL;
+ }
+
+ // TODO(p): Differentiate between a bad WebP, and not a WebP.
+ VP8StatusCode err = 0;
+ if ((err = WebPGetFeatures((const uint8_t *) data, len, &config.input))) {
+ set_error(error, "WebP decoding error");
+ return NULL;
+ }
+
+ cairo_surface_t *result = NULL;
+
+ cairo_surface_t *surface = cairo_image_surface_create(
+ config.input.has_alpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
+ config.input.width, config.input.height);
+ cairo_status_t surface_status = cairo_surface_status(surface);
+ if (surface_status != CAIRO_STATUS_SUCCESS) {
+ set_error(error, cairo_status_to_string(surface_status));
+ goto fail;
+ }
+
+ config.options.use_threads = true;
+
+ config.output.width = config.input.width;
+ config.output.height = config.input.height;
+ config.output.is_external_memory = true;
+ config.output.u.RGBA.rgba = cairo_image_surface_get_data(surface);
+ config.output.u.RGBA.stride = cairo_image_surface_get_stride(surface);
+ config.output.u.RGBA.size =
+ config.output.u.RGBA.stride * cairo_image_surface_get_height(surface);
+ if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
+ config.output.colorspace = MODE_bgrA;
+ else
+ config.output.colorspace = MODE_Argb;
+
+ if ((err = WebPDecode((const uint8_t *) data, len, &config))) {
+ set_error(error, "WebP decoding error");
+ goto fail;
+ }
+
+ // TODO(p): Extract metadata, support animations (has_animation).
+ result = surface;
+
+fail:
+ if (!result)
+ cairo_surface_destroy(surface);
+
+ WebPFreeDecBuffer(&config.output);
+ return result;
+}
+
+#endif // HAVE_LIBWEBP --------------------------------------------------------
#ifdef HAVE_LIBHEIF //---------------------------------------------------------
static cairo_surface_t *
@@ -1683,6 +1747,14 @@ fastiv_io_open_from_data(const char *data, size_t len, const gchar *path,
g_clear_error(error);
}
#endif // HAVE_XCURSOR --------------------------------------------------------
+#ifdef HAVE_LIBWEBP //---------------------------------------------------------
+ if ((surface = open_libwebp(data, len, error)))
+ break;
+ if (error) {
+ g_debug("%s", (*error)->message);
+ g_clear_error(error);
+ }
+#endif // HAVE_LIBWEBP --------------------------------------------------------
#ifdef HAVE_LIBHEIF //---------------------------------------------------------
if ((surface = open_libheif(data, len, path, error)))
break;